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March 4, 2015

March 4, 2015

Posted by **Bassel** on Sunday, December 18, 2011 at 7:24pm.

formula = mivi+m2v2= mivi+m2v2

so far I have something like this: m(+4m/s)m2(+2m/s) = m2(+2m/s)+v2. I believe it is wrong.

- Physics, science -
**drwls**, Sunday, December 18, 2011 at 9:59pmThe balls exchange speeds in an elastic head-on collision. Thus the second ball leaves at 4 m/s.

Note that total momentum and kinetic energy are conserved as a result. No other final velocity conserves both. The result than Ball #1 leaves at 2 m/s could have been predicted by solving both equations.

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